code: def IsTypePackable(field_type):
      """Return true iff packable = true is valid for fields of this type.
  
      Args:
        field_type: a FieldDescriptor::Type value.
  
      Returns:
        True iff fields of this type are packable.
      """
      return field_type not in NON_PACKABLE_TYPES
  
imports: import struct
  from google.protobuf import descriptor
  from google.protobuf import message
label_desc: Use image node_id 27 for calling a global function with example usage: IsTypePackable(field_type) and returns: unknown